Why do some softwares read short messages?

From the point of view of safety, it should be banned. Many softwares reveal personal privacy by reading this information. But if you need map software, you'd better open the location information for accurate positioning. Also, if it's WeChat or QQ, you are allowed to look at information such as contacts, because it's convenient to contact. Therefore, whether it is forbidden or allowed depends on your own needs, not all allowed or forbidden.